Abstract

Some results of structural studies on metal- purine nucleotide compounds are presented. The X-ray analysis of a new crystalline form of a copper(II)- inosine monophosphate complex reveals interesting conformational features in the nucleoside moieties. The ‘phosphate only’ binding mode seems to be the preferred one for ternary complexes of Mg(II), Ca(II), Mn(II), Co(II), Cu(II) and Zn(II) and purine nucleotide. The molecular structure already found in Mg(II), Ca(II), Mn(II) and Co(II)-ATP (adenosine 5′-triphosphate) complexes consisting of M(ATP) 2 units does not seem favorable for the Cu(II) cation.

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